Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual competição ocorreu em 1993?
 ###Tabelas: CREATE TABLE achievements (achievements_id AUTO_INCREMENT PRIMARY KEY, Year INT, Competition VARCHAR, Venue VARCHAR, Position VARCHAR, Event VARCHAR, Notes VARCHAR) CREATE TABLE universities_and_colleges_ranked_by_endowment (universities_and_colleges_ranked_by_endowment_id AUTO_INCREMENT PRIMARY KEY, State Rank INT, National Rank INT, Institution VARCHAR, Location VARCHAR, Public or Private VARCHAR, Endowment Funds VARCHAR, Percentage Change YOY VARCHAR) CREATE TABLE singles:_21_10_titles_11_runner-ups (singles:_21_10_titles_11_runner-ups_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Tournament VARCHAR, Surface VARCHAR, Opponent VARCHAR, Score VARCHAR) CREATE TABLE spartana (spartana_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Capacity VARCHAR, Power VARCHAR, Type VARCHAR, Torque VARCHAR) CREATE TABLE national_softball_congress_1947_to_1957 (national_softball_congress_1947_to_1957_id AUTO_INCREMENT PRIMARY KEY, Year INT, 1st Place Team VARCHAR, 2nd Place Team VARCHAR, 3rd Place Team VARCHAR, 4th Place Team VARCHAR, Host Location VARCHAR)  
SELECT Competition FROM achievements WHERE Year = 1993